In humans, the allele for Duchenne muscular dystrophy (d) is recessive to the normal allele (D). This is a sex-linked trait found on the X chromosome. A woman who does not have Duchenne muscular dystrophy has four children: a normal son, a son with Duchenne muscular dystrophy, and two normal daughters. The father does not have Duchenne muscular dystrophy. What is the genotype of each member of the family? If a person has more than one genotype possible, you must list each possibility!

1 answer
Question:

In humans, the allele for Duchenne muscular dystrophy (d) is recessive to the
normal allele (D). This is a sex-linked trait found on the X chromosome. A
woman who does not have Duchenne muscular dystrophy has four children: a
normal son, a son with Duchenne muscular dystrophy, and two normal
daughters. The father does not have Duchenne muscular dystrophy. What is the
genotype of each member of the family? If a person has more than one
genotype possible, you must list each possibility!

Answers

Answer:Father's genotype: Xd,YMother's genotype: XD,Xd (This is the only possible genotypes because if we assume that the genotype is XdXd, then all the children will be sick)Possible genotypes are: XDXd, XDY,XdXd,XdY

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